[Commits] Rev 3671: MDEV-4811 Assertion `offset < 0x1f' fails in type_and_offset_store on COLUMN_ADD in file:///home/bell/maria/bzr/work-maria-5.3-MDEV-4811/

Sergei Petrunia psergey at askmonty.org
Wed Aug 7 18:41:45 EEST 2013


Hi Sanja,

Ok to push.

On Thu, Aug 01, 2013 at 11:46:14AM +0300, sanja at montyprogram.com wrote:
> At file:///home/bell/maria/bzr/work-maria-5.3-MDEV-4811/
> 
> ------------------------------------------------------------
> revno: 3671
> revision-id: sanja at montyprogram.com-20130801084611-cu3wpoazd197g41w
> parent: sergii at pisem.net-20130715163225-6ch6x34lsufode3d
> committer: sanja at montyprogram.com
> branch nick: work-maria-5.3-MDEV-4811
> timestamp: Thu 2013-08-01 11:46:11 +0300
> message:
>   MDEV-4811 Assertion `offset < 0x1f' fails in type_and_offset_store on COLUMN_ADD
>   MDEV-4812 Valgrind warnings (Invalid write) in dynamic_column_update_many on COLUMN_ADD
>   
>   Fixed problem of working on wrong data (do not allow offset to out of string length).

> === modified file 'mysql-test/r/dyncol.result'
> --- a/mysql-test/r/dyncol.result	2013-03-26 11:07:46 +0000
> +++ b/mysql-test/r/dyncol.result	2013-08-01 08:46:11 +0000
> @@ -1404,5 +1404,26 @@ v1	CREATE ALGORITHM=UNDEFINED DEFINER=`r
>  drop view v1;
>  drop table t1;
>  #
> +# MDEV-4811: Assertion `offset < 0x1f' fails in type_and_offset_store 
> +# on COLUMN_ADD
> +#
> +CREATE TABLE t1 (dyn TINYBLOB) ENGINE=MyISAM;
> +INSERT INTO t1 SET dyn = COLUMN_CREATE( 40, REPEAT('a', 233), 4, REPEAT('b', 322) );
> +Warnings:
> +Warning	1265	Data truncated for column 'dyn' at row 1
> +SELECT COLUMN_ADD( dyn, 6, REPEAT('x',80), 4, REPEAT('y',215) AS INTEGER ) FROM t1;
> +ERROR HY000: Encountered illegal format of dynamic column string
> +DROP table t1;
> +#
> +# MDEV-4812: Valgrind warnings (Invalid write) in
> +# dynamic_column_update_many on COLUMN_ADD
> +#
> +CREATE TABLE t1 (dyncol TINYBLOB) ENGINE=MyISAM;
> +INSERT INTO t1 SET dyncol = COLUMN_CREATE( 7, REPEAT('k',487), 209, REPEAT('x',464) );
> +Warnings:
> +Warning	1265	Data truncated for column 'dyncol' at row 1
> +SELECT COLUMN_ADD( dyncol, 7, '22:22:22', 8, REPEAT('x',270) AS CHAR ) FROM t1;
> +DROP table t1;
> +#
>  # end of 5.3 tests
>  #
> 
> === modified file 'mysql-test/t/dyncol.test'
> --- a/mysql-test/t/dyncol.test	2013-03-26 11:07:46 +0000
> +++ b/mysql-test/t/dyncol.test	2013-08-01 08:46:11 +0000
> @@ -600,6 +600,29 @@ drop view v1;
>  drop table t1;
>  
>  --echo #
> +--echo # MDEV-4811: Assertion `offset < 0x1f' fails in type_and_offset_store 
> +--echo # on COLUMN_ADD
> +--echo #
> +
> +CREATE TABLE t1 (dyn TINYBLOB) ENGINE=MyISAM;
> +INSERT INTO t1 SET dyn = COLUMN_CREATE( 40, REPEAT('a', 233), 4, REPEAT('b', 322) );
> +--error ER_DYN_COL_WRONG_FORMAT
> +SELECT COLUMN_ADD( dyn, 6, REPEAT('x',80), 4, REPEAT('y',215) AS INTEGER ) FROM t1;
> +
> +DROP table t1;
> +
> +--echo #
> +--echo # MDEV-4812: Valgrind warnings (Invalid write) in
> +--echo # dynamic_column_update_many on COLUMN_ADD
> +--echo #
> +CREATE TABLE t1 (dyncol TINYBLOB) ENGINE=MyISAM;
> +
> +INSERT INTO t1 SET dyncol = COLUMN_CREATE( 7, REPEAT('k',487), 209, REPEAT('x',464) );
> +--error 0,ER_DYN_COL_WRONG_FORMAT
> +SELECT COLUMN_ADD( dyncol, 7, '22:22:22', 8, REPEAT('x',270) AS CHAR ) FROM t1;
> +DROP table t1;
> +
> +--echo #
>  --echo # end of 5.3 tests
>  --echo #
>  
> 
> === modified file 'mysys/ma_dyncol.c'
> --- a/mysys/ma_dyncol.c	2011-10-18 10:44:12 +0000
> +++ b/mysys/ma_dyncol.c	2013-08-01 08:46:11 +0000
> @@ -1228,13 +1228,14 @@ dynamic_column_create(DYNAMIC_COLUMN *st
>    @param header_end      Pointer to the header end
>    @param offset_size     Size of offset field in bytes
>    @param last_offset     Size of the data segment
> +  @param error           Set in case of error
>  
>    @return number of bytes
>  */
>  
>  static size_t get_length_interval(uchar *entry, uchar *entry_next,
>                                    uchar *header_end, size_t offset_size,
> -                                  size_t last_offset)
> +                                  size_t last_offset, my_bool *error)
>  {
>    size_t offset, offset_next;
>    DYNAMIC_COLUMN_TYPE type, type_next;
> @@ -1242,8 +1243,12 @@ static size_t get_length_interval(uchar
>  
>    type_and_offset_read(&type, &offset, entry, offset_size);
>    if (entry_next >= header_end)
> +  {
> +    *error= 0;
>      return (last_offset - offset);
> +  }
>    type_and_offset_read(&type_next, &offset_next, entry_next, offset_size);
> +  *error= (offset_next > last_offset);
>    return (offset_next - offset);
>  }
>  
> @@ -1255,17 +1260,18 @@ static size_t get_length_interval(uchar
>    @param header_end      Pointer to the header end
>    @param offset_size     Size of offset field in bytes
>    @param last_offset     Size of the data segment
> +  @param error           Set in case of error
>  
>    @return number of bytes
>  */
>  
>  static size_t get_length(uchar *entry, uchar *header_end,
>                           size_t offset_size,
> -                         size_t last_offset)
> +                         size_t last_offset, my_bool *error)
>  {
>    return get_length_interval(entry,
>                               entry + offset_size + COLUMN_NUMBER_SIZE,
> -                             header_end, offset_size, last_offset);
> +                             header_end, offset_size, last_offset, error);
>  }
>  
>  
> @@ -1304,6 +1310,7 @@ find_column(DYNAMIC_COLUMN_TYPE *type, u
>    uchar *entry;
>    size_t offset, total_data, header_size, entry_size;
>    uchar key[2+4];
> +  my_bool error;
>  
>    if (!entry_pos)
>      entry_pos= &entry;
> @@ -1329,12 +1336,12 @@ find_column(DYNAMIC_COLUMN_TYPE *type, u
>      return 1;
>    *data= header + header_size + offset;
>    *length= get_length(entry, header + header_size, offset_size,
> -                      total_data);
> +                      total_data, &error);
>    /*
>      Check that the found data is withing the ranges. This can happen if
>      we get data with wrong offsets.
>    */
> -  if ((long) *length < 0 || offset + *length > total_data)
> +  if (error || (long) *length < 0 || offset + *length > total_data)
>      return 1;
>  
>    *entry_pos= entry;
> @@ -1837,12 +1844,13 @@ dynamic_column_update_many(DYNAMIC_COLUM
>                     entry_size, column_count, &entry))
>      {
>        size_t entry_data_size;
> +      my_bool error;
>  
>        /* Data existed; We have to replace or delete it */
>  
>        entry_data_size= get_length(entry, header_end,
> -                                  offset_size, max_offset);
> -      if ((long) entry_data_size < 0)
> +                                  offset_size, max_offset, &error);
> +      if (error || (long) entry_data_size < 0)
>        {
>          rc= ER_DYNCOL_FORMAT;
>          goto end;
> @@ -2038,12 +2046,13 @@ dynamic_column_update_many(DYNAMIC_COLUM
>        /* copy first the data that was not replaced in original packed data */
>        if (start < end)
>        {
> +        my_bool error;
>          /* Add old data last in 'tmp' */
>          size_t data_size=
>            get_length_interval(header_base + start * entry_size,
>                                header_base + end * entry_size,
> -                              header_end, offset_size, max_offset);
> -        if ((long) data_size < 0 ||
> +                              header_end, offset_size, max_offset, &error);
> +        if (error || (long) data_size < 0 ||
>              data_size > max_offset - first_offset)
>          {
>            dynamic_column_column_free(&tmp);
> 

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-- 
BR
 Sergei
-- 
Sergei Petrunia, Software Developer
Monty Program AB, http://askmonty.org
Blog: http://s.petrunia.net/blog


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